How to Read Coverage — and the Metrics Beyond It
This is Part 18 of the “Frontend Testing, Done Right” series. Browse the full series · Glossary Open a coverage report and four numbers stare back — Stmts, Branch, Funcs, Lines. Which one matters? This article is about reading that report: which number is honest (spoiler: branch), what to fill in from the red lines, and where to look for the team health that numbers can’t show. If you’ve been following the series, this is the hands-on follow-up to the strategy part’s point that “coverage is a reference, not a target.” First time here from a search? That’s fine too — we use Vitest, but reading a report works the same no matter which tool you’re on. ...